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#!/bin/sh
#
# Copyright (C) 2012 Colomban Wendling <ban@herbesfolles.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# drop-in replacement and wrapper script for sfill to work around its lack of
# support for file size limits.
. gettext.sh
export TEXTDOMAIN="@GETTEXT_PACKAGE@"
export TEXTDOMAINDIR="@LOCALEDIR@"
SRM="@SRM_PATH@"
SFILL="@SFILL_PATH@"
OPT_f=
OPT_i=
OPT_I=
OPT_l=
OPT_v=
OPT_z=
MISSING_ROOT=0
# die [MESSAGE]
die() {
echo "$@" >&2
exit 1
}
# check we have the required tools
which "$SRM" >/dev/null || \
die "$(eval_gettext '$SRM: command not found. ')" \
"$(gettext "Please make sure secure-delete is correctly installed.")"
which "$SFILL" >/dev/null || \
die "$(eval_gettext '$SFILL: command not found. ')" \
"$(gettext "Please make sure secure-delete is correctly installed.")"
# parse arguments
while getopts 'fiIlvz' o; do
case "$o" in
f) OPT_f=-f;;
i) OPT_i=-i;;
I) OPT_I=-I;;
l) OPT_l="$OPT_l -l";;
v) OPT_v=-v;;
z) OPT_z=-z;;
esac
done
shift $(expr $OPTIND - 1)
[ $# -eq 1 ] || die "wrong arguments"
# do our work in a temp directory so in the worst case if we fail to cleanup we
# don't leave the user with tons of temp files but a single directory
dir=$(mktemp -d --tmpdir="$1") || die "$(gettext "failed to create temporary directory")"
cleanup() {
echo "$(gettext 'Terminated by signal. Clean exit.')" >&2
rm -rf '$dir'
exit 1
}
# progress_step
progress_step_STEP=0
progress_step() {
if [ -n $OPT_v ]; then
case "$(echo $OPT_l | wc -w)" in
0)
echo '*******************';;
1)
echo '*';;
*)
[ "$progress_step_STEP" -gt 0 ] && echo '*'
;;
esac
progress_step_STEP=1
fi
}
trap "rm -rf '$dir'" EXIT
trap cleanup INT QUIT TERM
if [ `whoami` != root ]; then
# before trying to become root, check whether the FS on which we will work
# actually requires root privileges
fstype=$(df -T "$dir" | tail -n1 | tr -s ' ' | cut -d' ' -f 2)
case $fstype in
msdos|umsdos|vfat) # no need to be root for those FS
[ -n $OPT_v ] || echo "$(eval_gettext 'File system type is $fstype, no need to be root')"
;;
*) # guess we better be root for all other FS types, so try to become root!
if which pkexec >/dev/null; then
pkexec --user root "$0" $OPT_f $OPT_i $OPT_I $OPT_l $OPT_v $OPT_z "$dir"
code=$?
if [ $code -ne 126 -a $code -ne 127 ]; then
# if becoming root succeeded, abort this instance
exit $code
fi
fi
echo "$(gettext "Continuing without root privileges, wipe may be incomplete")" >&2
MISSING_ROOT=1
;;
esac
fi
# fill disk space, workaround for file size limit
if [ -z "$OPT_i" ]; then
input=/dev/zero
[ -r "$input" ] || die "$input is not readable"
while [ 1 ]; do
file=$(mktemp --tmpdir="$dir") || die "failed to create temp file"
dd if="$input" of="$file" bs=8M conv=fdatasync 2>&1
# if the file we tried to create has size 0, guess there's actually no
# space left on device
size=$(stat -c '%s' "$file") || die "failed to stat file '$f'"
[ "$size" = 0 ] && break
done
sync
progress_step
fi
# launch sfill as wanted, now there is not much free space
sfill_v=$OPT_v
# don't report progress if we're also filling disk space
[ -z "$OPT_i" ] && sfill_v=
"$SFILL" $OPT_f $OPT_i $OPT_I $OPT_l $sfill_v $OPT_z "$dir"
# and finally securely remove temporary files created earlier
if [ -z "$OPT_i" ]; then
"$SRM" -r $OPT_f $OPT_l $OPT_z "$dir"
progress_step
fi
# if we missed root permissions, report this as a special failure (42)
if [ $MISSING_ROOT -ne 0 ]; then
echo "$(gettext "Wipe succeeded but may have been incomplete due to missing root privileges.")">&2
exit 42
fi
|
